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[thirdparty/linux.git] / drivers / gpu / drm / virtio / virtgpu_gem.c
1 /*
2 * Copyright (C) 2015 Red Hat, Inc.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26 #include <drm/drm_file.h>
27 #include <drm/drm_fourcc.h>
28
29 #include "virtgpu_drv.h"
30
31 int virtio_gpu_gem_create(struct drm_file *file,
32 struct drm_device *dev,
33 struct virtio_gpu_object_params *params,
34 struct drm_gem_object **obj_p,
35 uint32_t *handle_p)
36 {
37 struct virtio_gpu_device *vgdev = dev->dev_private;
38 struct virtio_gpu_object *obj;
39 int ret;
40 u32 handle;
41
42 ret = virtio_gpu_object_create(vgdev, params, &obj, NULL);
43 if (ret < 0)
44 return ret;
45
46 ret = drm_gem_handle_create(file, &obj->base.base, &handle);
47 if (ret) {
48 drm_gem_object_release(&obj->base.base);
49 return ret;
50 }
51
52 *obj_p = &obj->base.base;
53
54 /* drop reference from allocate - handle holds it now */
55 drm_gem_object_put_unlocked(&obj->base.base);
56
57 *handle_p = handle;
58 return 0;
59 }
60
61 int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
62 struct drm_device *dev,
63 struct drm_mode_create_dumb *args)
64 {
65 struct drm_gem_object *gobj;
66 struct virtio_gpu_object_params params = { 0 };
67 int ret;
68 uint32_t pitch;
69
70 if (args->bpp != 32)
71 return -EINVAL;
72
73 pitch = args->width * 4;
74 args->size = pitch * args->height;
75 args->size = ALIGN(args->size, PAGE_SIZE);
76
77 params.format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888);
78 params.width = args->width;
79 params.height = args->height;
80 params.size = args->size;
81 params.dumb = true;
82 ret = virtio_gpu_gem_create(file_priv, dev, &params, &gobj,
83 &args->handle);
84 if (ret)
85 goto fail;
86
87 args->pitch = pitch;
88 return ret;
89
90 fail:
91 return ret;
92 }
93
94 int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
95 struct drm_device *dev,
96 uint32_t handle, uint64_t *offset_p)
97 {
98 struct drm_gem_object *gobj;
99
100 BUG_ON(!offset_p);
101 gobj = drm_gem_object_lookup(file_priv, handle);
102 if (gobj == NULL)
103 return -ENOENT;
104 *offset_p = drm_vma_node_offset_addr(&gobj->vma_node);
105 drm_gem_object_put_unlocked(gobj);
106 return 0;
107 }
108
109 int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
110 struct drm_file *file)
111 {
112 struct virtio_gpu_device *vgdev = obj->dev->dev_private;
113 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
114 struct virtio_gpu_object_array *objs;
115
116 if (!vgdev->has_virgl_3d)
117 return 0;
118
119 objs = virtio_gpu_array_alloc(1);
120 if (!objs)
121 return -ENOMEM;
122 virtio_gpu_array_add_obj(objs, obj);
123
124 virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
125 objs);
126 virtio_gpu_notify(vgdev);
127 return 0;
128 }
129
130 void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
131 struct drm_file *file)
132 {
133 struct virtio_gpu_device *vgdev = obj->dev->dev_private;
134 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
135 struct virtio_gpu_object_array *objs;
136
137 if (!vgdev->has_virgl_3d)
138 return;
139
140 objs = virtio_gpu_array_alloc(1);
141 if (!objs)
142 return;
143 virtio_gpu_array_add_obj(objs, obj);
144
145 virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
146 objs);
147 virtio_gpu_notify(vgdev);
148 }
149
150 struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents)
151 {
152 struct virtio_gpu_object_array *objs;
153 size_t size = sizeof(*objs) + sizeof(objs->objs[0]) * nents;
154
155 objs = kmalloc(size, GFP_KERNEL);
156 if (!objs)
157 return NULL;
158
159 objs->nents = 0;
160 objs->total = nents;
161 return objs;
162 }
163
164 static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs)
165 {
166 kfree(objs);
167 }
168
169 struct virtio_gpu_object_array*
170 virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents)
171 {
172 struct virtio_gpu_object_array *objs;
173 u32 i;
174
175 objs = virtio_gpu_array_alloc(nents);
176 if (!objs)
177 return NULL;
178
179 for (i = 0; i < nents; i++) {
180 objs->objs[i] = drm_gem_object_lookup(drm_file, handles[i]);
181 if (!objs->objs[i]) {
182 objs->nents = i;
183 virtio_gpu_array_put_free(objs);
184 return NULL;
185 }
186 }
187 objs->nents = i;
188 return objs;
189 }
190
191 void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs,
192 struct drm_gem_object *obj)
193 {
194 if (WARN_ON_ONCE(objs->nents == objs->total))
195 return;
196
197 drm_gem_object_get(obj);
198 objs->objs[objs->nents] = obj;
199 objs->nents++;
200 }
201
202 int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs)
203 {
204 int ret;
205
206 if (objs->nents == 1) {
207 ret = dma_resv_lock_interruptible(objs->objs[0]->resv, NULL);
208 } else {
209 ret = drm_gem_lock_reservations(objs->objs, objs->nents,
210 &objs->ticket);
211 }
212 return ret;
213 }
214
215 void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs)
216 {
217 if (objs->nents == 1) {
218 dma_resv_unlock(objs->objs[0]->resv);
219 } else {
220 drm_gem_unlock_reservations(objs->objs, objs->nents,
221 &objs->ticket);
222 }
223 }
224
225 void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs,
226 struct dma_fence *fence)
227 {
228 int i;
229
230 for (i = 0; i < objs->nents; i++)
231 dma_resv_add_excl_fence(objs->objs[i]->resv, fence);
232 }
233
234 void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs)
235 {
236 u32 i;
237
238 for (i = 0; i < objs->nents; i++)
239 drm_gem_object_put_unlocked(objs->objs[i]);
240 virtio_gpu_array_free(objs);
241 }
242
243 void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev,
244 struct virtio_gpu_object_array *objs)
245 {
246 spin_lock(&vgdev->obj_free_lock);
247 list_add_tail(&objs->next, &vgdev->obj_free_list);
248 spin_unlock(&vgdev->obj_free_lock);
249 schedule_work(&vgdev->obj_free_work);
250 }
251
252 void virtio_gpu_array_put_free_work(struct work_struct *work)
253 {
254 struct virtio_gpu_device *vgdev =
255 container_of(work, struct virtio_gpu_device, obj_free_work);
256 struct virtio_gpu_object_array *objs;
257
258 spin_lock(&vgdev->obj_free_lock);
259 while (!list_empty(&vgdev->obj_free_list)) {
260 objs = list_first_entry(&vgdev->obj_free_list,
261 struct virtio_gpu_object_array, next);
262 list_del(&objs->next);
263 spin_unlock(&vgdev->obj_free_lock);
264 virtio_gpu_array_put_free(objs);
265 spin_lock(&vgdev->obj_free_lock);
266 }
267 spin_unlock(&vgdev->obj_free_lock);
268 }